You should be able to find a shop manual for this at the local library...make copies of the right pages...)
Change the belt
Not sure ,but it costs $115 to change mine on my 1998 Dodge Durango.
You can do that by replacing the tensioner
Here it is:
100,000 miles
Yes, there should be.
no!
The 2000 Dodge Caravan alternator can be changed by removing the alternator belt. Remove the wiring harness from the back of the alternator. Loosen and remove the alternator retaining bolts. Install the new alternator by reversing the process.
You cannot adjust the belt tension on a 2000 dodge grand caravan. This vehicle is equipped with an automatic tensioner. If tensioner is frozen or will not hold the belt tight, it must be replaced.
what is the engine size?
If the belt screeches when you turn at low engine rpm you need to change it. This separate steering belt is on the 2.4 Caravan, 1996-2000. - On all other models it's driven by the serpentine belt.
You don't change the belt because it has a timing chain.